Some further code changes to ARIA Live Regions

Here are some addition headings, some CSS code also
A second tranche of commits
ARIA coded needed here
Update Live Region.html
Update Simple_form_required.html
Update LiveRegion_somemarket2.html
Update Required_aria_tables.html

Needs more work, thanks
Merge pull request #1 from JCathead/test_branch

Test branch request
Merge branch 'test_branch'

Conflicts:
	Live Region.html